The Arduino RFID/NFC 13.56 MHz Module can be connected to an Arduino (such as the Arduino Uno) using an XBee Shield and will communicate using the Arduino serial port (UART). It's also compatible with Waspmote (see below).

Arduino RFID/NFC Plug-in Board Features

The following image shows this module (a slightly different PCB) plugged into an XBee Shield which in turn is plugged into an Arduino Uno:

Compatible with Waspmote

A specific API has been developed to allow use of this module with a Waspmote sensor platform (this module plugs into the Waspmote Expansion Board). There are many useful functions which can be used as a guideline for other designs. This module is the same as Waspmote part number W1356.